CN105378278A - Axial piston pump - Google Patents

Axial piston pump Download PDF

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Publication number
CN105378278A
CN105378278A CN201480037558.5A CN201480037558A CN105378278A CN 105378278 A CN105378278 A CN 105378278A CN 201480037558 A CN201480037558 A CN 201480037558A CN 105378278 A CN105378278 A CN 105378278A
Authority
CN
China
Prior art keywords
piston pump
axial piston
pressure compensation
compensation channel
fluid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201480037558.5A
Other languages
Chinese (zh)
Other versions
CN105378278B (en
Inventor
M·科隆帕斯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
He Deke Transmission Centered Finite Co
Hydac Drive Center GmbH
Original Assignee
He Deke Transmission Centered Finite Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE102013008677.9A external-priority patent/DE102013008677A1/en
Priority claimed from DE102013008676.0A external-priority patent/DE102013008676A1/en
Priority claimed from DE102013008629.9A external-priority patent/DE102013008629A1/en
Priority claimed from DE102013008678.7A external-priority patent/DE102013008678A1/en
Priority claimed from DE102013008679.5A external-priority patent/DE102013008679A1/en
Priority claimed from DE102013008681.7A external-priority patent/DE102013008681A1/en
Application filed by He Deke Transmission Centered Finite Co filed Critical He Deke Transmission Centered Finite Co
Publication of CN105378278A publication Critical patent/CN105378278A/en
Application granted granted Critical
Publication of CN105378278B publication Critical patent/CN105378278B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/26—Control
    • F04B1/30—Control of machines or pumps with rotary cylinder blocks
    • F04B1/32—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block
    • F04B1/328—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block by changing the inclination of the axis of the cylinder barrel relative to the swash plate
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
    • C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
    • C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
    • C23C24/106—Coating with metal alloys or metal elements only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B3/00—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F01B3/10—Control of working-fluid admission or discharge peculiar thereto
    • F01B3/103—Control of working-fluid admission or discharge peculiar thereto for machines with rotary cylinder block
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B3/00—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F01B3/10—Control of working-fluid admission or discharge peculiar thereto
    • F01B3/103—Control of working-fluid admission or discharge peculiar thereto for machines with rotary cylinder block
    • F01B3/106—Control of working-fluid admission or discharge peculiar thereto for machines with rotary cylinder block by changing the inclination of the swash plate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
    • F03C1/0602—Component parts, details
    • F03C1/0605—Adaptations of pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/122—Details or component parts, e.g. valves, sealings or lubrication means
    • F04B1/124—Pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/122—Details or component parts, e.g. valves, sealings or lubrication means
    • F04B1/124—Pistons
    • F04B1/126—Piston shoe retaining means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/2014—Details or component parts
    • F04B1/2035—Cylinder barrels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/2014—Details or component parts
    • F04B1/2064—Housings
    • F04B1/2071—Bearings for cylinder barrels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/2014—Details or component parts
    • F04B1/2078—Swash plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/2014—Details or component parts
    • F04B1/2078—Swash plates
    • F04B1/2085—Bearings for swash plates or driving axles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/26—Control
    • F04B1/30—Control of machines or pumps with rotary cylinder blocks
    • F04B1/303—Control of machines or pumps with rotary cylinder blocks by turning the valve plate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/26—Control
    • F04B1/30—Control of machines or pumps with rotary cylinder blocks
    • F04B1/32—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/26—Control
    • F04B1/30—Control of machines or pumps with rotary cylinder blocks
    • F04B1/32—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block
    • F04B1/324—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block by changing the inclination of the swash plate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
    • F04B11/0091—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using a special shape of fluid pass, e.g. throttles, ducts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/08—Regulating by delivery pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/14—Special methods of manufacture; Running-in
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B3/00—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F01B3/0082—Details
    • F01B3/0085—Pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B19/00—Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B1/00 - F04B17/00
    • F04B19/20—Other positive-displacement pumps
    • F04B19/22—Other positive-displacement pumps of reciprocating-piston type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/0873—Component parts, e.g. sealings; Manufacturing or assembly thereof
    • F04B27/0878—Pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2204/00—Metallic materials; Alloys
    • F16C2204/30—Alloys based on one of tin, lead, antimony, bismuth, indium, e.g. materials for providing sliding surfaces
    • F16C2204/34—Alloys based on tin
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2223/00—Surface treatments; Hardening; Coating
    • F16C2223/30—Coating surfaces
    • F16C2223/46—Coating surfaces by welding, e.g. by using a laser to build a layer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2360/00—Engines or pumps

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Pivots And Pivotal Connections (AREA)
  • Manufacturing & Machinery (AREA)

Abstract

The invention relates to an axial piston pump, particularly for hydraulic systems, comprising a cylinder drum (1) which can be rotationally driven about an axis (15) in a pump housing (7), and in which piston cylinder units are arranged in a circle at an offset, said pistons (21) being at least indirectly supported on a swashplate (3) by their actuation end (31) which is accessible outside the cylinder drum (1). Between the swept volumes (19) of the piston cylinder units and a stationary fluid inlet and stationary fluid outlet of the pump housing (7), a control device (23) is arranged which comprises fluid channels (25, 26) for the targeted transfer of fluid from the fluid inlet into the swept volumes (19) and from said swept volumes (19) to the fluid outlet. The invention is characteriZed in that at least one pressure compensation channel (28, 30) is provided in the control device (23), between said fluid channels (25, 26), in order to build or release fluid pressure in the swept volumes (19) in a targeted manner.

Description

Axial piston pump
Technical field
The present invention relates to a kind of axial piston pump, in particular for hydraulic system, this axial piston pump comprise can in pump case around axis by the cylinder barrel of rotary driving, in this cylinder barrel, piston-cylinder unit is arranged on a circle with staggering, multiple piston is supported on swash plate at least indirectly by their come-at-able operative end outside cylinder barrel, and between the stroke chamber of piston-cylinder unit and the fluid input fixed of pump case and fixing fluid output, be provided with control gear, this control gear comprises for be imported stroke chamber from fluid input by fluid targetedly and import multiple fluid passages of fluid output from stroke chamber.
Background technique
This kind of axial piston pump belongs to prior art.They are widely used in for customer (as clutch release slave cylinder, oil hydraulic motor etc.) supply pressure medium.Compared with the axial piston pump with fixing swash plate known equally, beginning put forward type, the advantage of axial piston pump that swash plate is adjustable relative to the inclination of axis is: be in operation better energy balance.Even if even if do not required energy by the unit of pressure medium operated and therefore also must overcome the flow resistance in oil hydraulic circuit when dallying, the driving-energy for this reason consumed does not provide any useful energy, but the pump with fixing swash plate is as the fluid volume stream of metering pump delivered constant all the time under given driving rotating speed, and delivered volume can be adjusted to zero by the adjustable of swash plate inclination and can make to minimize the demand of driving-energy.This kind of axial piston pump is open in document DE4415510C1.Implement continuous print stroke motion because piston is in operation, even if arrange the piston-cylinder unit of a greater number in cylinder barrel, the pressure produced also cannot avoid pressure pulse.Therefore, the measure such as in pulsed damper form for smoothed pressure pulse is needed in some cases when using this pump.
Summary of the invention
In view of this problem, task of the present invention is to provide a kind of axial piston pump, and its advantage is relatively more level and smooth pressure diagram.
According to the present invention, this task is solved by the axial piston pump with the whole feature of claim 1.
Characteristic according to claim 1, key character of the present invention is: in described control gear, be provided with at least one pressure compensation channel between each fluid passage so that targetedly set up or removal stroke chamber in hydrodynamic pressure.Such possibility that Open from This Side, namely makes to minimize at the compression shock through cylinder and the control edge on the pressure side and between suction side fluid passage by following manner: on the pressure side produced corresponding pressure before fluid passage by pressure compensation channel or eliminated pressure by compensation channel before arriving suction side fluid passage arriving.Especially thus in commutating zone on the pressure side, make the pressure of generation more mild from suction side.
Preferably specify like this at this: a stroke chamber can only be connected with high-voltage power supply respectively by corresponding pressure compensation channel, high-voltage power supply can be such as at least one pressing chamber.This room such as accessible site is in the lower housing portion of pump case, and the control gear with fluid passage is connected with described lower housing portion.
Particularly advantageously corresponding pressure compensation channel is set like this, makes could set up the connection with corresponding stroke chamber at fluid input to after the connection closed of the trip room.
In addition, pressure compensation channel can be arranged like this, makes the connection could closing this pressure compensation channel and corresponding stroke chamber after the connection establishment of fluid output and the trip room.
In order to eliminate pressure targetedly before the connection of setting up corresponding stroke chamber and suction side fluid passage, the second pressure compensation channel can be set, a stroke chamber can only be connected with low pressure source respectively by this second pressure compensation channel.Low pressure source can be such as fuel tank, and it is the constituent element of the oil return system matched.
The pressure compensation channel leading to low pressure source can be arranged like this, makes the connection could setting up this pressure compensation channel and corresponding stroke chamber after the connection closed of fluid output and the trip room.
Can specify like this in the arranging of the second pressure compensation channel, make the connection could setting up this pressure compensation channel and corresponding stroke chamber after the connection closed of fluid output and the trip room; And the connection with corresponding stroke chamber could be closed at fluid input to after the connection establishment of the trip room.
In the especially preferred embodiments, control gear is fixing control panel, and it is preferably configured for the bottom of the stroke chamber of rotary piston-piston-cylinder unit, and this control panel also has the fluid passage of the preferred kidney shape, to set up the connection with piston-cylinder unit.
In such an embodiment, in described control panel, be provided with at least one pressure compensation channel of the form in hole.
Control panel can be arranged on the connecting plate that is configured in the lower housing portion of pump case, is arranged in this connecting plate at this corresponding pressing chamber, and is provided with for from pressing chamber to the connecting passage of the pressure compensation channel matched.
Preferably, corresponding pressing chamber is closed by thread plug.
Accompanying drawing explanation
Below with reference to the accompanying drawings the present invention is described in detail.Accompanying drawing is as follows:
Fig. 1 is the sectional arrangement drawing of the axial piston pump according to an embodiment of the present invention;
Fig. 2 be the lower housing portion of the embodiment of Fig. 1, see to the control panel on the connecting plate being fixed on lower housing portion, the perspectivity oblique drawing of partly cut-away;
Fig. 3 is the perspectivity oblique drawing of the control panel illustrated separately;
Fig. 4 to 6 is the functional schematic of the working method for illustration of axial piston pump of the present invention.
Embodiment
Fig. 1 illustrates a kind of embodiment of the axial piston pump in inclined disc type structural type of the present invention.In this kind of axial piston pump, usually being provided with in pump case 7 can by the cylinder barrel 1 of rotary driving, for this cylinder barrel configuration swash plate 3, described swash plate is rotating to regulate transmission power and therefore to regulate the system pressure that can be produced by pump, and the rotation axis of swash plate 3 represents with reference character 37 in FIG.Pump case 7 is included in this figure the top 9 and bottom 11 that are positioned at top.To be bearing in top 9 to be rotated around the axis represented with reference character 15 in tapered roller bearing 16 for the live axle 13 of cylinder barrel 1 and to support by sliding bearing 17 in bottom 11.The cylinder room 19 of cylinder barrel 1 and directed wherein piston 21 (in the sectional drawing of Fig. 1 only a visible cylinder room 19) contact with control panel 23 in the cylinder end portion, below of this figure, and this control panel abuts in lower housing portion 11.Control panel 23 have for pass into cylinder barrel 1 cylinder room 19 suction side interface 27 and on the pressure side carry out the control mouth of the fluid passage 25 and 26 connected between interface 29.Control panel 23 (it illustrates separately in figs 2 and 3) has coating 24 (see Fig. 2) on the side above being positioned in the figure of cylinder barrel 1, this coating is made according to the method for the present invention and form supporting surface, slides in the bottom surface 8 that the indent slightly of cylinder barrel 1 is bending in rotary motion on this supporting surface.Represent the parts of coating 24 in FIG with reference character 6, described parts are formed in the bearing position between the control mouth of center through hole 14 and adjacent fluid passage 25 and 26.
When cylinder barrel 1 moves, piston 21 is being positioned at slip on the slip surface 33 on the downside of swash plate 3 respectively by slide 31.Be connected, this globular hinge is consisted of the bulb 34 on piston 21 and the ball-and-socket 36 in slide 31 slide 31 and globular hinge shape on the upside of the piston of the piston 21 matched.This globular hinge is by interior crimping 38 be fixed on slide 31.Oilhole 35 in bulb 34 and slide 31 is configured for the entrance of the fluid (as hydraulic oil) lubricating slip surface 33.Corresponding to control panel 23, slide 31 also has coating 24 made according to the method for the present invention.
As mentioned above, in order to regulate delivered volume, swash plate 3 can adjust around rotation axis 37, and this rotation axis is arranged in the plane of the slip surface 33 of swash plate 3.Rotation axis 37 is limited by the swash plate support formed between swash plate 3 and top 9.This swash plate support comprises plastic supporting cover 39 on top 9, and swash plate 3 is directed on this plastic supporting cover by spherical segment slip surface 41.In slip surface 41, in order to make live axle 13 pass, formed in swash plate 3 to the upper conical through hole 43 broadened.Otherly in the both sides of through hole 43 be provided with the guide rail 45 that stretches out from slip surface 41 part as swash plate support.Rotational motion is carried out around rotation axis 37 in order to make swash plate 3, the side being positioned at the left side in FIG of swash plate 3 is threaded with rocking bar 47, this rocking bar is in other 15 extensions and can moving, to cause swash plate 3 around the corresponding rotational motion of rotation axis 37 along the direction extended perpendicular to plan on its underpart 49 in FIG of paralleling to the axis of cylinder barrel 1.Rocking bar 47 is threaded on the side matched of swash plate 3 by the internal thread being arranged in hole 51.
Hinged pipe 5 be supply and hold down gag constituent element and as shown in Figure 1 edge parallel to the axis 15 direction be arranged on by cylinder barrel 1 side.Hinged pipe 5 is bearing in the accommodating part 53 in the connecting base 55 of lower housing portion 11 by its underpart in FIG, and accommodating part 53 allows hinged pipe 5 to move axially.Seat 55 comprise in FIG sightless lead on the pressure side 29 connecting passage, this connecting passage passes in the accommodating part 53 of hinged pipe 5.The upper end portion of hinged pipe 5 is articulated and connected by link 58 and swash plate 3, and this link is laterally positioned on the downside of swash plate 3 outside slip surface 33.This is articulated and connected and is realized by a kind of globular hinge and have bulb 59 on the upper end portion of hinged pipe 5, and this bulb is contained in the ball-and-socket 61 of link 58.Hinged pipe 5 is forced on swash plate 3 via link 58.For this purpose, between the underpart of hinged pipe 5 and the bottom of accommodating part 53, cup spring group 63 is provided with.Fluid connection is on the pressure side extended to swash plate 3 by the mouth of pipe on bulb 59 by the fluid passage 67 in link 58.The path 67 of link 58 is connected with the lubrication channel 73,75 be configured within swash plate 3, only can see some lubrication channels in FIG and wherein vertical passage 75 lead to slip surface 41 be suitably for rolling disc support supply oiling agent position on.
Fig. 2 illustrates lower housing portion 11 with such orientation, can see in this orientation be arranged on upside on control panel 23 and on the pressure side 29 side direction interface.Side above being arranged in fig. 2 of lower housing portion 11 is provided with the cylindrical compression room 18 that two are integrated in shell body wall, and they are closed by thread plug 12 and within it end are connected with attachment hole 20 and 22.A pressure compensation channel 28 in narrow pressing chamber well format be configured in control panel 23 is passed in described attachment hole.Roughly oppositely with pressing chamber hole 28, in control panel 23, construct the pressure compensation channel 30 that another is relief hole form, it has little cross section equally.On the end that is adjacent with relief hole 30, that associate with low voltage side or suction side 27 of kidney shape fluid passage 25, edge of opening comprises flattened portion, and it forms and controls otch 32.Describe pressing chamber hole 28, relief hole 30 in detail below with reference to Fig. 4 to 6 and control the function of otch 32.
Fig. 4 to 6 illustrates the work cycle of the single cylinder 19 of cylinder barrel 1 with the form of functional schematic with the control panel 23 launching display, represents sense of rotation and represent direction of piston travel with arrow 42 at this with arrow 40.Top dead center and lower dead center represent with OT and UT.According to the sense of rotation represented with reference character 40, Fig. 4 illustrates such process, that is:, after aspiration procedure terminates, the piston 21 being arranged in top dead center closes the connection with low voltage side fluid passage 25, and then (on the left of Fig. 4) connects pressing chamber hole 28.Thus, before the connection with fluid passage, high pressure side 26 is connected, just build-up pressure in the volume of cylinder 19 is started by the supply of pressing chamber 18.Should the state after the intake stroke of piston 21 terminates illustrate on the left of Fig. 5, connect now in the connection of this and fluid passage, high pressure side 26, simultaneously pressing chamber 18 is also connected with cylinder 19 by pressing chamber hole 28, and present pressing chamber 18 is loaded by the pressure side fluid passage 26 thus.In the next step of work cycle (as shown on the right side of Fig. 5), piston 21 carries out delivery stroke, is closed by the connection of pressing chamber hole 28 with pressing chamber 18 simultaneously.Such situation is shown on the left of Fig. 6, that is: starts to connect by the connection of relief hole 30 with the fuel tank 46 being used as low pressure source when the intake stroke of piston 21 starts.Thus, before being connected with low voltage side fluid passage 25, eliminate the residual pressure in cylinder 19, as shown on the right side of Fig. 6.Furtherly, can not carry out on the whole cross section of fluid passage 25 suddenly with the connection of low voltage side fluid passage 25, but gently carry out on control otch 32 as shown on the right side of Fig. 6.
Before opening fluid passage, high pressure side 26, by being connected with pressing chamber 18, the pressure in cylinder 19 from " swabbing pressure " to " working pressure " rises.Extract pressure from pressing chamber 18 for this reason.After being connected with fluid passage, high pressure side 26, this fluid passage is connected with pressing chamber 18 with pressing chamber hole 28 by cylinder volume, so that before nearest piston 21 enters commutating zone, the pressure in pressing chamber 18 is brought up on work on hand pressure again.In conjunction with the gentle transition realized by control otch 32 with before by the pressure release (see situation shown on the left of Fig. 6) that relief hole 30 causes, produce that optimize generally, that there is pressure minimum pulse service behaviour.

Claims (13)

1. an axial piston pump, in particular for hydraulic system, this axial piston pump comprise can in pump case (7) around axis (15) by the cylinder barrel of rotary driving (1), in this cylinder barrel, piston-cylinder unit is arranged on a circle with staggering, multiple piston (21) is supported on swash plate (3) by their come-at-able operative end (31) outside cylinder barrel (1) at least indirectly, and between the stroke chamber (19) of described piston-cylinder unit and the fluid input fixed of connecting plate (11) and fixing fluid output, be provided with control gear (23), this control gear comprises for be imported stroke chamber (19) from fluid input by fluid targetedly and import the fluid passage (25 of fluid output from stroke chamber (19), 26), it is characterized in that, in each fluid passage (25 in this control gear (23), 26) at least one pressure compensation channel (28 is provided with between, 30), so that targetedly set up or removal stroke chamber (19) in hydrodynamic pressure.
2. axial piston pump according to claim 1, is characterized in that, a stroke chamber (19) can only be connected with high-voltage power supply (18) respectively by corresponding pressure compensation channel (28).
3. axial piston pump according to claim 1 and 2, is characterized in that, described high-voltage power supply is at least one pressing chamber (18).
4. according to the axial piston pump one of the claims Suo Shu, it is characterized in that, corresponding pressure compensation channel (28) is set to, and makes could set up the connection with the trip room (19) after fluid input (25) with the connection closed of corresponding stroke chamber (19).
5. according to the axial piston pump one of the claims Suo Shu, it is characterized in that, described pressure compensation channel (28) is set to, and makes the connection could closing this pressure compensation channel and the trip room (19) after the connection establishment of fluid output (26) and corresponding stroke chamber (19).
6. according to the axial piston pump one of the claims Suo Shu, it is characterized in that, be provided with the second pressure compensation channel (30), a stroke chamber (19) can only be connected with low pressure source (46) respectively by this second pressure compensation channel.
7. according to the axial piston pump one of the claims Suo Shu, it is characterized in that, described low pressure source (46) is fuel tank (46).
8. according to the axial piston pump one of the claims Suo Shu, it is characterized in that, described second pressure compensation channel (30) is set to, and makes the connection could setting up this second pressure compensation channel and the trip room (19) after the connection closed of fluid output (26) and corresponding stroke chamber (19).
9. according to the axial piston pump one of the claims Suo Shu, it is characterized in that, described second pressure compensation channel (30) is set to, and makes the connection could closing this second pressure compensation channel and the trip room (19) after the connection establishment of fluid input (25) and corresponding stroke chamber (19).
10. according to the axial piston pump one of the claims Suo Shu, it is characterized in that, described control gear is fixing control panel (23), preferably this control panel is configured for the bottom of the stroke chamber (19) of rotary piston-piston-cylinder unit (1), and control panel (23) also has the fluid passage (25,26) of the preferred kidney shape, to set up the connection with piston-cylinder unit (1).
11., according to the axial piston pump one of the claims Suo Shu, is characterized in that, are provided with in hole at least one pressure compensation channel of the form of (28,30) in described control panel (23).
12. according to the axial piston pump one of the claims Suo Shu, it is characterized in that, described control panel (23) is arranged on the connecting plate (11) of housing (7), be arranged in this connecting plate (11) at this corresponding pressing chamber (18), and be provided with for the connecting passage (20,22) from this pressing chamber (18) to the pressure compensation channel matched (28).
13., according to the axial piston pump one of the claims Suo Shu, is characterized in that, corresponding pressing chamber (18) is closed by thread plug (12).
CN201480037558.5A 2013-05-22 2014-05-15 Axial poiston pump Active CN105378278B (en)

Applications Claiming Priority (13)

Application Number Priority Date Filing Date Title
DE102013008679.5 2013-05-22
DE102013008681.7 2013-05-22
DE102013008676.0 2013-05-22
DE102013008677.9 2013-05-22
DE102013008677.9A DE102013008677A1 (en) 2013-05-22 2013-05-22 Hydraulic pump and piston for such a hydraulic pump
DE102013008676.0A DE102013008676A1 (en) 2013-05-22 2013-05-22 axial piston pump
DE102013008629.9 2013-05-22
DE102013008629.9A DE102013008629A1 (en) 2013-05-22 2013-05-22 joint arrangements
DE102013008678.7A DE102013008678A1 (en) 2013-05-22 2013-05-22 Process for coating a pump component
DE102013008678.7 2013-05-22
DE102013008679.5A DE102013008679A1 (en) 2013-05-22 2013-05-22 axial piston pump
DE102013008681.7A DE102013008681A1 (en) 2013-05-22 2013-05-22 Axial piston pump in swashplate design
PCT/EP2014/001323 WO2014187546A1 (en) 2013-05-22 2014-05-15 Axial piston pump

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CN105378278A true CN105378278A (en) 2016-03-02
CN105378278B CN105378278B (en) 2017-12-19

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CN201480036884.4A Active CN105339657B (en) 2013-05-22 2014-03-12 With the axial poiston pump of inclined disc type structure type
CN201480029168.3A Expired - Fee Related CN105247103B (en) 2013-05-22 2014-04-30 Method for carrying out coating for pumping element
CN201480029158.XA Pending CN105308318A (en) 2013-05-22 2014-05-15 Axial piston pump
CN201480037558.5A Active CN105378278B (en) 2013-05-22 2014-05-15 Axial poiston pump
CN201480023828.7A Expired - Fee Related CN105164414B (en) 2013-05-22 2014-05-16 Hydraulic pump and the piston for such hydraulic pump

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CN201480029168.3A Expired - Fee Related CN105247103B (en) 2013-05-22 2014-04-30 Method for carrying out coating for pumping element
CN201480029158.XA Pending CN105308318A (en) 2013-05-22 2014-05-15 Axial piston pump

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EP (5) EP2999885B1 (en)
JP (5) JP6426717B2 (en)
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